Ensure project works in CLion inside the dev container

We need to pass the toolchain file and ensure the ARM toolchain is present in PATH, otherwise the CLion "Check Compiler" step, which comes after the normal CMake generation, will fail to use the ARM GCC.

Author: dariusarnold

CMakePresets.json

@@ -35,6 +35,10 @@
         "ENABLE_CCACHE": {
           "type": "BOOL",
           "value": true
+        },
+        "CMAKE_TOOLCHAIN_FILE": {
+          "type": "PATH",
+          "value": "cmake-nRF5x/arm-gcc-toolchain.cmake"
         }
       }
     },

docker/Dockerfile

@@ -71,5 +71,8 @@ RUN adduser infinitime && echo "infinitime:it" | chpasswd && usermod -aG sudo in
 # Configure Git to accept the /sources directory as safe
 RUN git config --global --add safe.directory /sources
 
+# Ensure ARM toolchain is available in PATH so CLion can find it.
+ENV PATH="$PATH:/opt/gcc-arm-none-eabi-10.3-2021.10/bin/"
+
 ENV SOURCES_DIR /sources
 CMD ["/opt/build.sh"]